If you are going to make something as silly as an application like this, at least give functionality to choose a window to send the spam to. Using sendkeys is a generally bad idea, it isn't sent to any one process, and could make it difficult for the user to use it in the manner they want. I suggest you add functionality to select a window/process to send they keys to (protip: you won't need sendkeys to do this, instead, look into pInvoke.